Solution of ferric quinate and albumen.



UNITED STATES PATENT oEEIoE.

IsIDoR TRAUBE AND RICHARD WOLFFENSTEIN, or BERLIN, GERMANY, ASSIGNORS TO ROBERT C. scHuPPHAUs, OF NEW YORK, N. Y.

'To all whom it may concern.-

SOLUTION OF FERRIC QUINATE AND ALB'UMEN.

Be it known that we, ISIDOR TRAUBE and RIoEARD WOLFEENsTEIN, subjects of the King of Prussia, German Emperor, residing at Berlin, in the Kingdom of Prussia and German Empire, have invented new and useful Improvements for the Solution of Ferric tion for reasons not accounted for. When of ferrocyanid the more copious the precipitate of albumen and similar bodies and the less digestible the preparation, as proved by clinical experiments. Quinic acid and its compounds were found to possess the property of dissolving vthe colloidal precipitates produced by ferric ions, as well as of preventing their formation when used in suitable proportions. If a few drops of a ten-per- I cent. aqueous solution of ferric quinate are t e precipitation of colloids.

added to pure egg albumen, no precipitate is formed. A few drops of a ten-per-cent. solution of ferric chlorid cause the same quantity of egg albumen to curdle completely. In other words, no precipitation ensues when iron and quinic acid are present in the proportion of their molecular weights. Hence our new iron compounds contain at least a uantity of quinic acid sufficient to prevent Its action on the body being beneficent, there can be no objection to its presence. The ironis present as ion, as in aqueous solutions of ferric chlorid, ferric quinate, and similar iron salts. These compounds are essentially different from such preparations as elixir chinae ferratum, which are chiefly quinin mixtures and being mostly alcoholic extracts could hardly contain appreciable quantities of quinic acid, owing to the slight solubility .of the salts of quinic acid in alcohol.

The ferrated albumen and peptone com- Specification of Letters Patent.

Application filed February 15,1906. Serial No. 301,317.

Patented Dec. 25, 1906.

" pounds of more recent origin are undoubtedly more digestible yet they also do not contain iron 1ons. There can be no doubt that compounds easily yielding iron ions present the iron in a form that is more readily assimilated.

, I We employ, preferably, ouriron compounds in conjunction with albuminous substances. For the first time we have liquid preparawith-dissolvedalbumen or similar bodies.

A solution embodying our invention may be prepared by saturating an aqueous soluequivalent quantity of ferric hydrate, preferably freshly made by precipitating a ferricchlorid solution with sodium carbonate. To this the whites of six eggs and one hundred and fifty grams of cane-sugar are added and the whole concentrated to two hundred and seventy-five grams. Thus a stock solution suitable for dispensing purposes'is obtained containing twenty per cent. of ferric quinate. The equivalent weight of ferric hydrate is 9.29 grams. The concentration is carried on below 56 centigrade, preferably in vacuo or in a current of an inert gas. Or instead of dissolving ferric hydrate in quinic acid (hydrogen quinate) a soluble iron salt, such as ferric chlorid, may be acted upon by sodium quinate. The viscous fluid of dark color contains albumen and iron in solution, not in a state of mutual combination.

What-we claim as our invention, and desire to secure by Letters Patent, is

l. The process of obtaining a stable solution containing an organic, colloid and an iron salt which consists in combining the solution of said colloid with an iron compound and a quinate.

2. As a new article of manufacture a stable viscous solution, of dark color, containing an organic, colloid and an iron compound not chemically combined, and a quinate.

1 In testimony whereof we have signed our names to this specification in the two subscribingwitnesses.

ISIDOR TRAUBE. RICHARD WOLFFENSTEIN.

presence of tions containing simple iron salts together .tion of fiftygrams of quinic acid with the 7 

